<html>
<head>
<style>
.test {
  background-color: #fec;
  display: inline-block;
  width: 5em;
  height: 5em;
}

.first {
  box-shadow: inset 0 0 1px -3px rgba(0,0,10,0.25);
}
</style>
</head>

<body>
<div class="first test"></div>
</body>
</html>
